Lift for drop-hammers and the like.



S. SWEDBNBORG LIFT FOR DROP HAMMERS AND THE LIKE.

APPLICATION FILED OUTJB, 1913.

Patented Aug. 18, 1914.

2 SHEETS-SHEET 1.

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S. SWEDENBORG. LIFT FOR DROP HAMMERS AND THE LIKE APPLICATION FILED 001216. 101a.

1,107,866. Patented Aug. 18, 1914.

3 SHEETS-SHEET 2.

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In: NURRI$ PETERE- cu PHUTO-LIYHO. WASHINGYON. D. C.

UNITED g STATES PATENTOFFICE.

swan swnnnnnone, or CLEVELAND, 0:110, ASSIGNOR To THE PHOENIX FOUNDRY AND ivu onrunooivirnlvv, or ASHTABU'LA, OHIOWA. CORPORATION or OHIO;

LIFT FOR DROP-:ll-IAMMERS AND THE LIKE.

Specification of Letters Patent; Pate 1 a A 6; 18, 1914 Application filed October-16, 1913. Serial No. 795,460.

To all whom it may concern:

Be it known that I, SWAN SWEDENBORG, a

citizen of:the United States, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented a certain new anduseful Improvement in Lifts for Drop- I-Iammers and the like, of which the following isa full, clear, and exact description,

reference being had to the accompanying.

drawings. 1 a

i This lnvention relates to that class ofdevices which are commonly knownas lifts for drop hammers and the like, whereby the hammer head is raised a predetermined distance and then allowed to drop of its own weight to deliver a blow to the object upon which it is operating. 1

Prevailing types of devices of the above character with which I am familiar, cspe cially those which are used in connection with extremely heavy hammersyinvolve a crank, or itsequivalent, which is connected inclirectlyto the hammer head through a fiexible member, such as a piece of belting. In the operation of these devices, the crank, during substantially 180 of its rotation,

lifts the hammer head to its highestposition,

and then, through certain mechanism, permits the hammer head to fall suddenly. .It

will be seen from this that there is an appreciable angular movement of the crank, as it enters and leaves its active zone of 180, when it exerts only a very slight lifting effect upon the hammerhead and absolutely none during its other 180 of rotation. This prolonged dwell and subsequent slow or languid riseof the hammer from its lowest position results in a] considerable loss of time in a days work; and, moreover,'1n-order that the full weight of the hammer may be effective, there must be suilicient slack in the aforesaid flexible member to permit the hammer to actually rest upon the; worle Therefore, it will be seen that during the time the crank is passing through the 1neffective 180 and over center, the flexible member will flop around loosely until it is given a sudden jerkby the crank, such action being unpleasantto the operator and injurious to the flexible member.

It is the object of my invention to provide 1 a lift for drophammers and thelike which is extremely eflicient; substantial of construction; veryquick of action; and which, in ggneral, obviates the difficulties set forth a ove.

i A more limited object of my inventionis to provide a device of the above character which comprises a member arranged to be moved continually in onedirection to which a vibrating member may be positively secured; there being means provided for connecting the vibrating member to the moving member at one end of its stroke, and disconnecting it therefrom at the other endof its stroke, such means involving an adjustment whereby the angle of movement of thembratmg member may be varled.

Avery important result which is attained by the device of my invention is the quick action of the hammer head, there being no appreciable dwell at eitherend of its stroke;

and this is due to the fact that I employ only that portion of the angular movement ofthe rotating member which ismost eflec tive in the lifting of the hammer head.

Generally speaking, my invention may be defined as consistingofthe combinations of elements set forth in the annexed claims and illustrated in the accompanying drawlngs formmga part hereof, wherein-- Figure 1 is a front elevation of a power hammer having my improved lift applied thereto; Fig. 2 is a side elevation of the 11ft;

Fig. 3 is a horizontal section on the line 3-3 of Fig. 2; Fig. 4 is a central vertical section through the lift; while Fig. 5 is a vertical section on theline 5-5 of Fig. at, and looking in the direction of the arrows.

Referring to the drawings bythe use of reference numerals, 1 represents a :pair of.

side frames which are of general A shape, one of the uprights of each of the framesbeing offset sufficiently to provide a horizontal support for the shaft 2, which support with the cap 3, provides a complete ournal for a the end of said shaft. Mounted upon the shaft 2, just inside each ofthe sidelframes l, is a wheel 4 having, upon its periphery, a'

circumferential gear 5, and an adjoining:

opposite end of the flexible member being attached to the hammer head 11 which is guided vertically between the uprights 12,

supported from the base 13 of the hammer, The flexible member 10 may be composed of any approved belting material, such as leather. The wheels 4 are arrangedto be driven constantly from any suitable source of power, through the belt 14, the pulley 15 which is fixed to the end of the shaft 16, and the pinions 17 which are keyed to the shaft 16 and which mesh with the gears 5, said shaft being ournaled in the upper ends of the side frames 1 above the shaft 2 in bearings provided by the overhanging portions 18 of the frames and their surmounting caps 19. The projecting end of the shaft 16 carries, between the fixed pulley 15 and the adjacent frame, a loose pulley 15 in accordance with ordinary shop practice.

Extending vertically through a slot 7 in the vibrating arm 7, between the end that carries the link 9 and where the arm passes between the adjacent edges of the wheels 4, is a key 20. As will be seen most clearly from Fig. 4, this key consists of a wedge shaped member, the opposite edges of which converge gradually from bottom to top. The edge which is towardthe' center of the vibrating arm is composed of two similarly inclined portions between which ash'oulder 21 is formed for a'purpose which will be come apparent as the descriptionproceeds. A gib 22 occupies one end of the slot 7 and has an inclined face which engages the adjacent, continuous inclined edge of the key 20, and the inclined portions of the opposite edge of the key bear upon bars-23 which extend across the upper and lower edges of the arm and are secured to the oppositesides of a friction shoe 24, which has smooth,

curved portions for engagement with the, smooth portions 6 of the wheels 4. A vertical' web 25 which is located intermediate thecurved faces of the shoe 24, projects be tween the edges of the wheels 4 and assists in retaining the shoe in properposition. A

pair of tension springs 24 'which are an vchored to eye bolts near the end of the vibratingarm, are connected at their opposite ends to eye bolts carried by the shoe 24 and tend to draw the shoe away from the,

wheels 4.

The frames 1 are of channel construction and, as will be seen from Figs. 2 and 4, each of the frames is formed near its upper end with a portion which is. concentric to the shaft 2 and which is designated, generally,

' i at 1; and a similar portion extends between the lower ends of the uprights of each frame and is designated 1 Adapted to be bolted to the [outer flanges of the latter of these portions of the frames, is a casting 26 having a tubular, central boss 27, the longitudinal axis of which is substantially tangent with the are described by the key 20. A bolt 28 is adapted to be locked within the bore of the boss 27 in any adjusted position, and

the casting 26 is also capable of being adjusted alongIthe flanges l of the frames 1, a series of boltfholes 1 being provided for such purpose. A'somewhat similar casting 29 is bolted to the portions 1 of the side frames and is likewise capable of adjustment therealong by reason of the bolt holes 1 which extend through the flanges of the frames. A boss 30, similar to the boss 27 of the former casting 26, forms a part of the casting 29 and supports a bolt 31 which is slidable within the bore of the boss. During the operation of the lift, the raising of the bolt will be resisted by a weight 31 which is the boss 30'.

Extending from, and preferably forming a part of the casting 29, are a pair of brackets 32 between the outer ends of which is pivoted an angle-lever 33, one branch 34 of which lies between the brackets 32 and the other arm 35 of which projects downwardly and has at its lower end a pair of projections 36 for cocperation with the end of the arm 7 as will be explained hereinafter. Ex;

tending transversely across the upper edgesof the brackets 32 and supported in journals rising therefrom, is a shaft 37 which has a cam 38 adapted to operate upon the free end of the branch 34 of the angle-lever 33. A coil spring 39, supported upon a plate 40 which is secured to the underneath edges of the brackets 32, tends to press the end of the branch 34 of the lever 33 against the cam, and as a precaution ofsafety in the event that the spring 39'should become ineifective through'any reason, I provide leaf spring 41 which is carriedby the upper edges of the arms 32 and projects out over and down alongside the. depending branch 35 of the angle-lever and engages the outer edge thereof. An arm 42 is carried by the end of the shaft 37 and its free end has connection, through a rod 43, with a foot pedal 44 whereby said arm may be operated.

In the operation of the lift, the wheels 4 are constantly driven in the direction indi- ,cated by the arrows in Figs. 2,.and 4, through the pinions 17, the shaft 16, the tight pul ley 15 and the belt 14 fron'iany suitable source of power. Assuming that the parts are in the position shown in the drawings, that the foot pedal 44 is depressed to remove the projections 36 of the angle-lever 33 out of the path of the end of the vibratapplied to the upper end of the boltabove' wheels. Under such a condition, the wheels 4: will carry the shoe 24, and the adjacent end of thevibrating lever upwardly until the upper end of the key 20 comes into contact with the lower end of the bolt 31. This bolt constitutes a yielding stop (since it is permitted to slide through the boss 30) and thereby reduces the shock caused by the impact, the key 20 being gradually loosened as the bolt slideswithin theboss. hen the bolt comes to a definite stop, the movement; of the key will be positively arrested and the shoulder 21 will engage the lower of the bars 23; and with the key in suchposition,

the springs 24 will be permitted to draw the shoe 24 away from the wheels 4, thereby releasing the vibratingarm and, allowing it to rock, through the influence of the hammer head 11, until it again reaches the lower limit of its movement, when the foregoing operation will be repeated. Vhile I mentioned the fact that the springs 24: withdrew the shoe 24 from contact with the wheels 4:, such springs may ordinarily be dispensed with, although I include them in order to obviate any possible sticking or undue dragging of the parts. i

The cycle of operations above described will continue until the foot pedal 1:4 is released to allow the shaft 37 to return to its normal position with the cam 38 withdrawn from the end of the branch 34 of the anglelever 33. Thereafter, through the influence of the springs 37 and 41, the depending end of such lever 33 is thrown inwardly into the path of travel of the end of the vibrating arm 7 permitting such end to be :engaged by:

one of the projections 36 and thus held, with the hammer 11 elevated. Twoprojections 36 are provided for the purpose of making the engagementof the lever with the end of the arm. 7 more positive, thereby providing a safeguard against the accidental drop of the hammer.

Inorder to prevent undue vibration of the flexible member 10 when the hammer head has reached the limit of its downward movement and is at rest upon the work, I provide the weight 8 hereinbefore mentioned and carried by the end of the vibrating arm opposite'that which has connection with the hammer head. It is obvious that, by thus balancing the arm, the flexible member will be held comparatively tense.

Having thus described my invention, what I claim is 1. A device of the character set forth comprising, in combination, a member which is arranged to be continually moved in one direction, a member capable of vibration, and means whereby the second member is secured to thefirst mentioned member at substan tially the limit of its movement in the direction opposite that of the movement of the first member and released therefrom at substantially the limit of its movement in the other direction.

2. A device of the character set forth comprising, in combination, a member which is arranged to be continually moved in one direction, a member capable of vibration,

means whereby the second member is secured to the first mentioned member at substantially the limit of its movement in the direction opposite that of the movement of the' first member and released therefrom at sub- ;stantially the limit of its movement in the other direction, and a device for retaining said second member in released position.

3. A device of the character set forth comprising, n combinatlon, a member which is arranged tobc continually moved in one direction, a member capable of vibration,

means whereby the second member is secured to the-first mentioned member at substantially the limit of its movement in the direction opposite that of the movement of the first member andreleased therefronrat substantially the limit of its movement in the other direction, a device for retaining said second member in released position, and.

mechanism for actuating said device.

4. A device of the character set forth comprising,in combination, a member which is arranged to be continually rotated in one direction, a member which ispivoted at the axis of the rotating member, means for semovement in one direction, and the other of which renders said means ineffective when the pivoted member reaches substantially the limit of its movement in the opposite die rection. a

5. A lift for drop hammers comprisingfin combination, apivoted member which has connection with the hammer head, a me1nher which is arranged to be continually rotated on an axis coincident with the pivot of curing the pivoted member to the rotating the first mentioned member, means for con necting the pivoted member to the rotating member whereby the pivoted member will be moved to lift the hammer head, and a de vice for rendering inefiective the connecting means when the hammer head has been raised a predetermined distance.

6. A lift for drop han'imers' comprising, in combination, a pivoted member which has connection withthe hammer head, a member which is arranged to be continually rotated on an axis coincident with the pivot of the first mentioned member, means for connecting the pivoted member to the rotating member whereby the pivoted member will be moved to lift the hammer head, a device for rendering ineffective the connecting means when the hammer head has been raised a predetermined distance, and a stop for limiting the movement of the pivotedmember in the opposite direction and for rendering effective said connect ng means.

7. A 11ft tor drop hammers comprising,

in combination, a pivoted member which has connection with the hammer head, a member which is arranged to be continually rotated on an axis coincident with the pivot of the first mentioned member, means for connecting the pivoted member to the rotating member whereby the pivoted member will be moved to lift the hammer head, a device for rendering inefiective the connecting means when the hammer head has been raised a predetermined distance, a stop for limiting the movement of the pivoted member in the opposite direction and for rendering effective said connecting means, and mechanism which is adapted to retain the pivoted member in a position to suspend the hammer head. i I

8. A lift for drop hammers comprising, in combinatioma pivoted arm which has one of its ends connected to the hammer head, a member arranged to be continually rotated upon an axis substantially coincident with the pivot of said arm, means whereby the arm is secured to the rotating member when the hammer headhas reached the limit of its downward movement and is released therefrom when it has reached the limit of its upward movement, a device for retaining the arm in a position to suspend the hammer head, and mechanism for actuating said device.

9. A lift for drop hammers comprising, in combination, a pivoted arm to one end of which is connected the hammer head, a member which is arranged to be rotated continually on an axis coincident with the pivot of the arm, a shoe carried by the arm and adapted to engage the rotating member, means for forcing the shoe against the rotating member, and a device for rendering inefiective said means when the hammer head has been raised a predetermined distance.

in combination, a pivoted arm to one end ofwhich is connected the hammer head, a member which is arranged to be rotated continually on an axis'coincident with the pivot of the arm, a shoe carried by the vibrating arm and adapted to engage the rotating member, means for forcing the shoe against the rotating member, a device for rendering ineffective said means when the hammer head has been raised a predetermined distance, and a second device for rendering effective the aforesaid means when the hammer head is at the lower end of its stroke.

11. A lift for drop hammers comprising, in combination, a pivoted arm to one end of her which is arranged to be rotated continually on an axis coincident with the pivot of the arm and having a smooth circumferential portion, a shoe carried by the arm and adapted to engage the smooth portion of the rotating member,means for forcing the shoe against the said portion of the rotating memher, a device for rendering ineffectivesaid means when the v hammer head has been raised a predetermined distance, and a second device for rendering effective the aforesaio means when the hammer head is at the lower end of its stroke.

l 12. A lift for drop hammers comprising, in combination, a pivoted arm to one end of whichis connected the hammer head, a

tinually on an axis coincident with the pivot of the arm and having a smooth circumferential portion, friction shoe carried by the arm and adapted to engage the smooth portion of the rotating member, means for forcing the friction shoe against said portion of the rotating member, a device for rendering ineffective said means when the hammer head has been raised a predetermined distance, a second device for rendering effective the aforesaid means when the hammer head is at the lower end of its stroke, and mechanism for retaining the arm in a position to suspend the hammer.

13. A lift for drop hammers comprising, in combination, a friction wheel, means for driving said wheel continually in one direction, an arm which is pivoted upon the rotating axis of the Wheel and having one of its ends connected to the hammer head, a friction shoe slidable upon the arm and adapted to engage the friction wheel, means shoe away from the wheel, further means earned by the arm for moving the shoe into contact with the Wheel, a device for rendermg the last mentloned means inoperatlve when the hammer head 1s raised a predeter- 10. A lift for drop hammers comprising,

which is connected the hammer head, a mem member which is arranged to be rotatedcon carried by the arm for moving the friction mined distance, and a second device for rendering the same means operative when the hammer head is at the lower end of its stroke.

14. A lift for drophammers comprising,

in combination, a friction wheel, means for driving said wheel continually in one di rcction, an arm which is pivoted upon the rotating axis of the wheel and having one of its ends connected to the hammer head, a friction shoe slidable upon the arm and adapted to engage, the friction wheel, means carried by the arm for moving the friction shoe away from the wheel, further means carried by the arm for moving the shoe into contact with the wheel, a device for rendering the last mentioned means inoperative when the hammer head is raised a predetermined distance, a second device for rendering the same means operative when the hammer is at the lower end of its stroke, and mechanism for retaining the arm in position to suspend the hammer head.

A lift for drop hammers comprising, in combination, a friction wheel, means for driving said friction wheel continually in one direction, an arm pivoted on the rotating axis of said wheel and having connected with one of its ends the hammer head, a friction shoe slidable upon the arm and adapted to engage the friction wheel, the arm having an abutment adjacent the friction shoe, a wedge shaped key carried by said arm with its edges in engagement with the abutment and the shoe, a stop for one end of the key whereby the key will be moved with respect to the arm to permit the shoe to be withdrawn from contact with the friction wheel when the hammer head has been raised a predetermined distance, a second stop for engagement with the opposite end of the key to cause said key to force the friction shoe against the wheel when the hammer head has reached the lower end of.

its stroke.

16. A lift for drop hammers comprising, in combination, a pair of side frames, a shaft supported by said frames, a wheel upon said shaft and having a portion of its periphery provided with a circumferential gear and another part thereof provided with a friction surface, a second shaft supported,

the movementofthe key as the arm travels in one direction, an adjustable stop carried by the side frames for engaging the key as the vibrating arm travels in the opposite direction, and means for engaging the vibrating arm to retain it in a position to suspend the hammer.

l7. A lift for drop hammers comprising, in combination, a pairuof side frames,a shaft supported by said frames, a wheel upon said shaft and having a portion of its periphery provided with acircumferential gear and another part thereof provided with a friction surface, a second shaft supported by the side frames parallel to the first shaft and havlng a plmon through which the wheel is arranged to be continually rotated in one direction, an arm journaled upon the shaft alongside the wheel and having one of its ends connected to the hammer head and its opposite end provided with a weight, a friction shoe slidable upon the arm, said arm having an abutment adjacent thereto, a wedge shaped key between the abutment and the shoe, an adjustable, yielding stop carried by the side frames in a position to arrest the movement of the key as the arm travels in one direction, an, adjustable stop carried by the side frames for engaging the key as the vibrating arm moves in the opposite direction, a pair of parallel brackets extending from the side frames in the general direction of the end of the vibrating arm to which is connected the hammer head, an angle lever pivoted between the ends of said arms and having one of its branches provided with projections for engagement with the end of the vibrating lever when the same is in a position to suspend the hammer, a spring for rocking said angle lever to arm engaging position, a cam which engages the opposite branch of the angle lever to move the lever against the tension of the aforesaid spring, and mechanism for actuating said cam.

18. A lift for drop hammers comprising, in combination, a shaft, a pairof Wheels carried by said shaft and spaced apart, means arranged to drive the wheels c0n tinually in one direction and at the same speed, a member journaled upon the shaft between the wheels and having an end with which the hammer head has connections, means for connecting said member to the wheels whereby said member will be moved to lift the hammer head, and a device for rendering ineffective the connecting means when the hammer head has been raised a predetermined distance.

19. A lift for drop hammers comprising, in combination, a shaft, a pair of wheels carried by said shaft and having the adjacent portions of their peripheries provided with friction surfaces, means for driv ing the Wheels continuallyin one direct-ion is raised a predetermined distance, and a at the same speed, a member journaled upon second device for rendering the same means the shaft between the Wheels and having an perative wh n the amm r is at su stanend Which has connection With the hammer tially the lower end of its Stroke.

5 head, a shoe slidably carried by said anem- In testimony whereof, I hereunto affix my 15 her and adapted to engage the friction sursignature in the presence of two Witnesses. faces of both Wheels, means for forcing the SYVAN SVVEDENBORG. shoe into contact with the friction surfaces TWitnesses: of the Wheels, a device for rendering; said BRENNAN B. WEST,

10 means inoperative when the hammer head HUGH B. MOGILL.

Copier; of this patent may be olmtaimicl for five cents each, byaddressing the Commissioner of Patents.

Washington, 3). 0; 

